CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 388	$ 187	$ 792	$ 539
Other comprehensive income (loss), after tax
Net unrealized losses on investments with an allowance for credit losses	(1)	(2)	(9)	(6)
Net unrealized gains (losses) on other investments	(413)	(2,226)	257	(4,869)
Total unrealized gains (losses) on investments	(414)	(2,228)	248	(4,875)
Impact of changes in discount rates used to measure long-duration contract liabilities	256	1,507	(140)	3,142
Unrealized gains on cash flow hedges	8	6	6	24
Pension and postretirement benefits	6	5	15	12
Foreign currency translation	35	(68)	51	(83)
Other comprehensive income (loss)	(109)	(778)	180	(1,780)
Comprehensive income (loss)	279	(591)	972	(1,241)
Amounts attributable to noncontrolling interests	(17)	59	(77)	136
Total comprehensive income (loss) attributable to Loews Corporation	$ 262	$ (532)	$ 895	$ (1,105)